ARI: Make bridges/{bridgeID}/play queue sound files

Previously multiple play actions against a bridge at one time would cause
the sounds to play simultaneously on the bridge. Now if a sound is already
playing, the play action will queue playback to occur after the completion
of other sounds currently on the queue.

(closes issue ASTERISK-22677)
Reported by: John Bigelow
Review: https://reviewboard.asterisk.org/r/3379/
........

Merged revisions 412639 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@412641 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/stasis/control.c

@@ -368,12 +368,22 @@ void stasis_app_control_clear_roles(struct stasis_app_control *control)
 	ast_channel_clear_bridge_roles(control->channel);
 }
 
+int control_command_count(struct stasis_app_control *control)
+{
+	return ao2_container_count(control->command_queue);
+}
+
 int control_is_done(struct stasis_app_control *control)
 {
 	/* Called from stasis_app_exec thread; no lock needed */
 	return control->is_done;
 }
 
+void control_mark_done(struct stasis_app_control *control)
+{
+	control->is_done = 1;
+}
+
 struct stasis_app_control_continue_data {
 	char context[AST_MAX_CONTEXT];
 	char extension[AST_MAX_EXTENSION];

res/stasis/control.h

@@ -57,6 +57,15 @@ int control_dispatch_all(struct stasis_app_control *control,
  */
 void control_wait(struct stasis_app_control *control);
 
+/*!
+ * \brief Returns the count of items in a control's command queue.
+ *
+ * \param control Control to count commands on
+ *
+ * \retval number of commands in the command que
+ */
+int control_command_count(struct stasis_app_control *control);
+
 /*!
  * \brief Returns true if control_continue() has been called on this \a control.
  *
@@ -66,5 +75,7 @@ void control_wait(struct stasis_app_control *control);
  */
 int control_is_done(struct stasis_app_control *control);
 
+void control_mark_done(struct stasis_app_control *control);
+
 
 #endif /* _ASTERISK_RES_STASIS_CONTROL_H */